CVE catalog

CVE-2026-48695

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The _log() function in src/mikrotik_plugin/fastnetmon_mikrotik.php

[CVE catalog]

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published: May 26, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.07% · Oct 25, 2026

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The _log() function in src/mikrotik_plugin/fastnetmon_mikrotik.php (lines 107-108) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec("echo `date` \"- {FASTNETMON] - " . $msg . " \" >> " . $FILE_LOG_TMP). This is identical in pattern to the Juniper plugin vulnerability. The $msg variable contains unsanitized attack data from command-line arguments. An attacker who can influence argv[] values can inject arbitrary shell commands. The fix is to replace exec() with file_put_contents() or use escapeshellarg().

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	fastnetmon	sid	`1.2.9-1`	fixed
Debian	fastnetmon	forky	`1.2.9-1`	fixed
Debian	fastnetmon	trixie	`1.2.9-0+deb13u1`	fixed
Debian	fastnetmon	trixie-security	`1.2.9-0+deb13u1`	fixed
Debian	fastnetmon	bookworm	`1.2.4-2+deb12u1`	vulnerable
Debian	fastnetmon	bookworm-security	`1.2.4-2+deb12u1`	vulnerable
Cpe	fastnetmon	Not reported	Not reported	vulnerable
Cpe	fastnetmon	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	fastnetmon	source	sid	`1.2.9-1`	unimportant	Not reported	[1138646]
Debian	fastnetmon	source	forky	`1.2.9-1`	unimportant	Not reported	[1138646]
Debian	fastnetmon	source	trixie	`1.2.9-0+deb13u1`	not yet assigned	Not reported	[1138646]
Debian	fastnetmon	source	bookworm	`(unfixed)`	unimportant	Not reported	[1138646]

[Debian bug #1138646]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[fastnetmon]Affected
Details (6)
- 1.2.4-2+deb12u1 · amd64 · bookworm
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12
- 1.2.4-2+deb12u1 · arm64 · bookworm
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12
- 1.2.8-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12
- 1.2.8-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12
- 1.2.4-2+deb12u1 · amd64 · bookworm-security
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12
- 1.2.4-2+deb12u1 · arm64 · bookworm-security
  Affected
  nvd · fastnetmon · debian · bookworm; nvd · fastnetmon · debian · 12

[Debian 13 (Trixie)]

[fastnetmon]Fixed
Details (4)
- 1.2.9-0+deb13u1 · amd64 · trixie
  Fixed · Fixed: 1.2.9-0+deb13u1
  nvd · fastnetmon · debian · 13
- 1.2.9-0+deb13u1 · arm64 · trixie
  Fixed · Fixed: 1.2.9-0+deb13u1
  nvd · fastnetmon · debian · 13
- 1.2.9-0+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 1.2.9-0+deb13u1
  nvd · fastnetmon · debian · 13
- 1.2.9-0+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 1.2.9-0+deb13u1
  nvd · fastnetmon · debian · 13

Observed: Oct 27, 2026, 7:33:17 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]